Buttermilk - Traditional Buttermilk

Traditional Buttermilk

Originally, buttermilk was the liquid left over from churning butter from cultured or fermented cream. Traditionally, before cream could be skimmed from whole milk, the milk was left to sit for a period of time to allow the cream and milk to separate. During this time, naturally occurring lactic acid-producing bacteria in the milk fermented it. This facilitates the butter churning process, since fat from cream with a lower pH coalesces more readily than that of fresh cream. The acidic environment also helps prevent potentially harmful microorganisms from growing, increasing shelf-life. However, in establishments that used cream separators, the cream was hardly acidic at all.

On the Indian subcontinent, the term "buttermilk"(छाछ, چھاچھ، لسی) refers to the liquid left over after extracting butter from churned yogurt (दही). Today, this is called traditional buttermilk. Traditional buttermilk is still common in many Indo-Pakistani households but rarely found in western countries. In Southern India and most areas of the Punjab, buttermilk with added water, sugar and/or salt, asafoetida, and curry leaves is given at stalls in festival times.